Maxim Integrated / MAX5216_16_Bit_DAC_SPI_Bus_Driver

Driver C++ source code for MAX5216/MAX5214 16-bit/14-bit DAC SPI (50MHz) bus ICs. Low power Digital-to_Analog Converter chips which accept supply voltages of 2.7V to 5.5V. Features Rail-to-Rail Buffered Output Operation and Safe Power-On Reset (POR) to Zero DAC Output.

Dependents:   MAX5216_16_Bit_DAC_Hello_Code

Fork of MAX5487_Digital_Pot_Potentiometer_Rheostat_Resistor_Wiper by Kevin Jung

Diff: MAX5216.cpp

Revision:
5:bd8dbd9be2ac
Parent:
4:280d1e05f2ca
Child:
6:cd8d96483262
diff -r 280d1e05f2ca -r bd8dbd9be2ac MAX5216.cpp
--- a/MAX5216.cpp	Sun Aug 12 10:04:09 2018 +0000
+++ b/MAX5216.cpp	Mon Aug 13 04:18:09 2018 +0000
@@ -37,50 +37,44 @@
     m_pin = 1;
 }
 
-void MAX5216::writeCommand(setting_t setting, uint32_t value)
+void MAX5216::writeCommand(setting_t setting, uint32_t value, pwrDwnMode_t mode)
 {
     
     char val[3] = {0, 0, 0};
     int i;
-    
-    if(value > MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)]) {
-        printf("value in writeCommand is too big: %X\r\n", value);
-        return;
-    }
     m_pin = 0;
-    if (m_ic_variant == MAX5214_IC) {  // MAX5214 is 14 bits
-        value &= MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)];
-    } else {                           // MAX5216 is 16 bits
-        value &= MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)];
-        value = value << 6;  // least significant 6 bits are not used
-        val[2] = value & 0xFF;
+    if (setting == PwrDwn_Reg) {
+        val[0] = char(value<<2);
+        val[0] |= char(setting);
+        for (i = 0; i < MAX521X_NUM_BYTES_SPI[(uint8_t)(m_ic_variant)]; i++) {
+            m_spi.write(val[i]);
+        }
+    } else if (setting == WrtThru_Reg){
+        
+        if(value > MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)]) {
+            printf("value in writeCommand is too big: %X\r\n", value);
+            return;
+        }
+        if (m_ic_variant == MAX5214_IC) {  // MAX5214 is 14 bits
+            value &= MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)];
+        } else {                           // MAX5216 is 16 bits
+            value &= MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)];
+            value = value << 6;  // least significant 6 bits are not used
+            val[2] = value & 0xFF;
+            value = value >> 8;
+        }
+        val[1] = value & 0xFF;
         value = value >> 8;
-    }
-    val[1] = value & 0xFF;
-    value = value >> 8;
-    val[0] = value;
-    val[0] |= setting;
-    //printf("mask %X, Value %X, val 0, 1, 2 %02X %02X %02X \r\n", MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)],value, val[0], val[1], val[2]);
-
-    for (i = 0; i < MAX521X_NUM_BYTES_SPI[(uint8_t)(m_ic_variant)]; i++) {
-        m_spi.write(val[i]);
+        val[0] = value;
+        val[0] |= setting;
+        //  printf("mask %X, Value %X, val 0, 1, 2 %02X %02X %02X \r\n", MAX521X_IC_BIT_MASK[(uint8_t)(m_ic_variant)],value, val[0], val[1], val[2]);
+        for (i = 0; i < MAX521X_NUM_BYTES_SPI[(uint8_t)(m_ic_variant)]; i++) {
+            m_spi.write(val[i]);
+        }
     }
     m_pin = 1;
 }
-#if 0 // tbd
-void MAX5216::writeCommand(setting_t setting, pwrDwnMode_t mode)
-{
-    char val[3] = {0, 0, 0};
-    int i;
-    m_pin = 0;
-    val[0] = setting | (char)(mode);
-    for (i = 0; i < MAX521X_NUM_BYTES_SPI[(uint8_t)(m_ic_variant)]; i++) {
-        m_spi.write(val[i]);
-    }
-    m_pin = 1;
-    
-}
-#endif
+
 MAX5216::~MAX5216(void) 
 {
   //empty block